Predictive map and machine control

ABSTRACT

A predictive map including predictive values of an agricultural characteristic of a worksite is obtained. An in-situ value of the agricultural characteristic is identified based on a sensor signal provided by an in-situ sensor. A corrected predictive map, including corrected predictive values of the agricultural characteristic, is generated based on the in-situ value of the agricultural characteristic. A controllable subsystem of a work machine is controlled based on the location of the work machine and the corrected predictive map.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation of and claims priority of U.S.patent application Ser. No. 16/380,691, filed Apr. 10, 2019, the contentof which is hereby incorporated by reference in its entirety.

FIELD OF THE DESCRIPTION

The present description relates to harvesters. More specifically, thepresent description relates to predictive maps for controlling aharvester.

BACKGROUND

There are a wide variety of different types of agricultural machines.Some such machines include harvesters, such as combine harvesters,forage harvesters, cotton harvesters, sugarcane harvesters, amongothers. Such machines can collect data that is used in machine control.

Some current systems attempt to predict yield in a field that is to beharvested (or is being harvested) by a harvester. For instance, somecurrent systems use aerial images that are taken of a field, in anattempt to predict yield for that field.

Also, some current systems attempt to use predicted yield in controllingthe harvester. Therefore, there is a relatively large body of work thathas been devoted to attempting to accurately predict yield from imagesof a field.

The discussion above is merely provided for general backgroundinformation and is not intended to be used as an aid in determining thescope of the claimed subject matter.

SUMMARY

A predictive map including predictive values of an agriculturalcharacteristic of a worksite is obtained. An in-situ value of theagricultural characteristic is identified based on a sensor signalprovided by an in-situ sensor. A corrected predictive map, includingcorrected predictive values of the agricultural characteristic, isgenerated based on the in-situ value of the agricultural characteristic.A controllable subsystem of a work machine is controlled based on thelocation of the work machine and the corrected predictive map.

This Summary is provided to introduce a selection of concepts in asimplified form that are further described below in the DetailedDescription. This Summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tobe used as an aid in determining the scope of the claimed subjectmatter. The claimed subject matter is not limited to implementationsthat solve any or all disadvantages noted in the background.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial pictorial, partial schematic illustration of acombine harvester.

FIG. 2 is a block diagram showing one example of a computing systemarchitecture that includes the combine harvester illustrated in FIG. 1.

FIGS. 3A and 3B (collectively referred to herein as FIG. 3) show a flowdiagram illustrating one example of the operation of the computingsystem architecture shown in FIG. 2.

FIG. 4 is a block diagram showing one example of the architectureillustrated in FIG. 1, deployed in a remote server environment.

FIGS. 5-7 show examples of mobile devices that can be used in thearchitectures shown in the previous figures.

FIG. 8 is a block diagram showing one example of a computing environmentthat can be used in the architectures shown in the previous figures.

DETAILED DESCRIPTION

As discussed above, there is a relatively large body of work that hasbeen devoted to attempting to predict yield for an agricultural field,based upon aerial images of that field. By way of example, some currentsystems attempt to predict yield by assigning a vegetation index valuewhich represents vegetation development, to different locations shown inthe aerial photograph. Yield is then predicted based upon the values ofthe vegetation index assigned to different portions of the field, in theimage. One example of a vegetation index that has been used is referredto as the Normalized Difference Vegetation Index (NDVI). Anothervegetation index that has been used is referred to as the Leaf AreaIndex. The current systems assign index values (using one of theabove-mentioned index systems, or a different one) based upon ananalysis of a land based or remote sensed image, which tends to indicatethe development of the vegetation under analysis in the image.

However, this can present problems. For example, plant NDVI values willnormally increase from 0 to approximately 0.6-0.7 at the peak vegetationperformance of the plant (that is, at a time during the growing seasonwhen the crop vegetation (the leaves, etc.) are most fully developed).At their peak vegetative performance, the plant spectral responsesaturates so that the spectral response is clipped at a near maximumvalue. This saturation means that, when attempting to control a combinebased on yield predicted using these images, sensitivity of the controlalgorithm is limited based on this saturation and the signal-to-noiseratio in the yield prediction process.

Thus, the present description describes a mechanism by which spectralanalysis is used to select images that are more useful in performingmachine control. It identifies those images which show a sufficientyield variability across the image. For instance, at a very early pointin the growing season, the images may not be useful because there is toolittle plant growth captured in the imagery. However, at various pointsin the growing season, the images may be highly useful because there hasbeen adequate plant growth and there is currently active plant growth,but there is still a good distribution in the vegetation index values,across the image. Then, once the plants are fully grown, the images maynot be as useful because the peak vegetative growth results in saturatedimagery and low yield prediction accuracy. Again, late in the season,where there is active plant senescence, the images may again show a goodvegetation index variation magnitude, variability and distribution,across the images, and thus be more useful in predicting yield.

Thus, the present description provides a system which selects imageswhere the vegetation index variability is sufficient so that the imagesare helpful in generating a predictive map. A predictive map isgenerated based on the selected images and is provided to the harvester.The harvester control system uses the predictive map, along with thecurrent harvester position and route, to control the harvester.

FIG. 1 is a partial pictorial, partial schematic, illustration of anagricultural machine 100, in an example where machine 100 is a combineharvester (or combine). It can be seen in FIG. 1 that combine 100illustratively includes an operator compartment 101, which can have avariety of different operator interface mechanisms, for controllingcombine 100, as will be discussed in more detail below. Combine 100 caninclude a set of front end equipment that can include header 102, and acutter generally indicated at 104. It can also include a feeder house106, a feed accelerator 108, and a thresher generally indicated at 110.Thresher 110 illustratively includes a threshing rotor 112 and a set ofconcaves 114. Further, combine 100 can include a separator 116 thatincludes a separator rotor. Combine 100 can include a cleaning subsystem(or cleaning shoe) 118 that, itself, can include a cleaning fan 120,chaffer 122 and sieve 124. The material handling subsystem in combine100 can include (in addition to a feeder house 106 and feed accelerator108) discharge beater 126, tailings elevator 128, clean grain elevator130 (that moves clean grain into clean grain tank 132) as well asunloading auger 134 and spout 136. Combine 100 can further include aresidue subsystem 138 that can include chopper 140 and spreader 142.Combine 100 can also have a propulsion subsystem that includes an engine(or other power source) that drives ground engaging wheels 144 ortracks, etc. It will be noted that combine 100 may also have more thanone of any of the subsystems mentioned above (such as left and rightcleaning shoes, separators, etc.).

In operation, and by way of overview, combine 100 illustratively movesthrough a field in the direction indicated by arrow 146. As it moves,header 102 engages the crop to be harvested and gathers it toward cutter104. After it is cut, it is moved through a conveyor in feeder house 106toward feed accelerator 108, which accelerates the crop into thresher110. The crop is threshed by rotor 112 rotating the crop against concave114. The threshed crop is moved by a separator rotor in separator 116where some of the residue is moved by discharge beater 126 toward theresidue subsystem 138. It can be chopped by residue chopper 140 andspread on the field by spreader 142. In other implementations, theresidue is simply dropped in a windrow, instead of being chopped andspread.

Grain falls to cleaning shoe (or cleaning subsystem) 118. Chaffer 122separates some of the larger material from the grain, and sieve 124separates some of the finer material from the clean grain. Clean grainfalls to an auger in clean grain elevator 130, which moves the cleangrain upward and deposits it in clean grain tank 132. Residue can beremoved from the cleaning shoe 118 by airflow generated by cleaning fan120. That residue can also be moved rearwardly in combine 100 toward theresidue handling subsystem 138.

Tailings can be moved by tailings elevator 128 back to thresher 110where they can be re-threshed. Alternatively, the tailings can also bepassed to a separate re-threshing mechanism (also using a tailingselevator or another transport mechanism) where they can be re-threshedas well.

FIG. 1 also shows that, in one example, combine 100 can include groundspeed sensor 147, one or more separator loss sensors 148, a clean graincamera 150, and one or more cleaning shoe loss sensors 152. Ground speedsensor 147 illustratively senses the travel speed of combine 100 overthe ground. This can be done by sensing the speed of rotation of thewheels, the drive shaft, the axel, or other components. The travel speedand position of combine 100 can also be sensed by a positioning system157, such as a global positioning system (GPS), a dead reckoning system,a LORAN system, or a wide variety of other systems or sensors thatprovide an indication of travel speed.

Cleaning shoe loss sensors 152 illustratively provide an output signalindicative of the quantity of grain loss by both the right and leftsides of the cleaning shoe 118. In one example, sensors 152 are strikesensors (or impact sensors) which count grain strikes per unit of time(or per unit of distance traveled) to provide an indication of thecleaning shoe grain loss. The strike sensors for the right and leftsides of the cleaning shoe can provide individual signals, or a combinedor aggregated signal. It will be noted that sensors 152 can compriseonly a single sensor as well, instead of separate sensors for each shoe.

Separator loss sensor 148 provides a signal indicative of grain loss inthe left and right separators. The sensors associated with the left andright separators can provide separate grain loss signals or a combinedor aggregate signal. This can be done using a wide variety of differenttypes of sensors as well. It will be noted that separator loss sensors148 may also comprise only a single sensor, instead of separate left andright sensors.

It will also be appreciated that sensor and measurement mechanisms (inaddition to the sensors already described) can include other sensors oncombine 100 as well. For instance, they can include a residue settingsensor that is configured to sense whether machine 100 is configured tochop the residue, drop a windrow, etc. They can include cleaning shoefan speed sensors that can be configured proximate fan 120 to sense thespeed of the fan. They can include a threshing clearance sensor thatsenses clearance between the rotor 112 and concaves 114. They include athreshing rotor speed sensor that senses a rotor speed of rotor 112.They can include a chaffer clearance sensor that senses the size ofopenings in chaffer 122. They can include a sieve clearance sensor thatsenses the size of openings in sieve 124. They can include a materialother than grain (MOG) moisture sensor that can be configured to sensethe moisture level of the material other than grain that is passingthrough combine 100. They can include machine setting sensors that areconfigured to sense the various configurable settings on combine 100.They can also include a machine orientation sensor that can be any of awide variety of different types of sensors that sense the orientation orpose of combine 100. Crop property sensors can sense a variety ofdifferent types of crop properties, such as crop type, crop moisture,and other crop properties. They can also be configured to sensecharacteristics of the crop as they are being processed by combine 100.For instance, they can sense grain feed rate, as it travels throughclean grain elevator 130. They can sense yield as mass flow rate ofgrain through elevator 130, correlated to a position from which it washarvested, as indicated by position sensor 157, or provide other outputsignals indicative of other sensed variables. Some additional examplesof the types of sensors that can be used are described below.

Also, it will be noted that FIG. 1 shows only one example of machine100. Other machines, such as forage harvesters, cotton harvesters,sugarcane harvesters, etc. can be used as well.

FIG. 2 is a block diagram showing one example of a computing systemarchitecture 180. Architecture 180, in the example shown in FIG. 2 showsthat an aerial image capture system 182 captures a set of aerial imagesand/or other image capture systems 183 can capture other images. Theimages 184 represent a spectral response captured by one or more ofimage capture systems 182 and 183 and are provided to a predictive mapgeneration system 186. Predictive map generation system 186 selectsimages 184 that are to be used in generating a predictive map 188. Thepredictive map 188 is then provided to the control system of harvester100 where it is used to control harvester 100.

It will be noted that, in FIG. 2, predictive map generation system 186is shown separate from harvester 100. Therefore, it can be disposed on aremote computing system or elsewhere. In another example, however,predictive map generation system 186 can also be disposed on harvester100. These and other architectures are contemplated herein. Beforedescribing the overall operation of architecture 180 in more detail, abrief description of some of the items in architecture 180, and theiroperation, will first be provided.

Aerial image capture system 182 can be any type of system that capturesaerial images (or a spectral response) of a field being harvested, or tobe harvested, by harvester 100. Thus, system 182 can include asatellite-based system where satellite images are generated as images184. It can be a system that uses unmanned aerial vehicles to capturesimages 184, or manned aerial vehicles. It can be another type of aerialimage capture system as well. Other image capture systems 183 can beother types of ground based image capture systems that capture thespectral response of the field as well.

Predictive map generation system 186 illustratively includes one or moreprocessors or servers 190, communication system 192, data store 194,spectral analysis system 196, image selection logic 198, map generationlogic 200, map correction logic 202, and it can include a wide varietyof other items 204. Spectral analysis system 196 can include imagequality identifier logic 205, vegetation index metric identifier logic206 (which, itself, can include leaf area index logic 208, croporientation detector logic 209, NDVI logic 210, other remote sensingindex logic 211, and/or other logic 212), image analysis logic 214(which, itself, can include adequate plant growth identifier 216,magnitude identifier 215, distribution identifier 217, variabilityidentifier 218, and it can include other items 220), as well as otheritems 222. Image selection logic 198 can, itself, include multifactoroptimization logic 223, threshold logic 224, sorting logic 226 and/orother logic 228. In operation, communication system 192, receives images184 from system 182 and/or 183, or from another system where they may bestored. It can also receive other information about the field, such astopology, crop type, environmental and crop conditions, among otherthings. Thus, communication system 192 can be a system that isconfigured to communicate over a wide area network, a local areanetwork, a near field communication network, a cellular communicationnetwork, or any other of a wide variety of different networks orcombinations of networks.

Once the images 184 are received, spectral analysis system 196 performsa spectral analysis on the images and image selection logic 198 selectsimages for map generation, based upon the spectral analysis. In oneexample, image quality identifier 205 performs an initial check to seethat an image is of sufficient quality. For instance, it can look forthe presence of clouds, shade, obscurants, etc. Vegetation index metricidentifier logic 206 identifies a set of vegetation index metricscorresponding to each of the images received. Those metric values willvary across the image, based upon the particular metric beingcalculated. For instance, where the leaf area index is used, leaf areaindex logic 208 will generate leaf area index values corresponding todifferent portions of the aerial image (and thus corresponding todifferent portions of the field). Where NDVI is used, NDVI logic 210will generate NDVI metric values for different portions of the image.Crop orientation detector logic 211 can detect crop orientation (e.g.,downed crop, lodged crop, etc.). Other remote sensing index logic 211can generate other index metric values for different portions of theimage.

Image analysis logic 214 then determines whether the vegetation indexmetrics are adequate for this particular image. It can do that byidentifying the magnitude of the range of the vegetation index metrics,how the vegetation index metric values vary across the image, and thedistribution. These can be performed by magnitude identifier 215,variability identifier 218 and distribution identifier 217. If the leafarea index metrics are used, it identifies those characteristics forthose metric values across the image. If the NDVI metric is used, itidentifies the characteristics for those metric values across the image.

First, however, adequate plant growth identifier 216 determines whetherthe image was taken at a time when there was adequate plant growth. Ifit was taken too early in the season (such as before the plants emerged,or shortly after they emerged) then there may not be sufficient plantgrowth to generate the vegetation index values adequately. Adequateplant growth identifier 216 thus analyzes the image to ensure that therehas been adequate plant growth, reflected in the image, so that thevegetation index values are meaningful.

Assuming the image under analysis reflects adequate plant growth,magnitude identifier 215 identifies the magnitude of the range of thevegetation index metric values. Distribution identifier 217 identifiestheir distribution and variability identifier 218 then identifies therange of distribution or variability of the vegetation index metricvalues across the image to identify a variability level. This can bedone through distribution analysis, mean trend observations, time seriesanalysis of distribution means, standard deviation or using other tools.

Once an indication of magnitude, distribution and variability has beenassigned to the image, image selection logic 198 determines whether thatimage should be selected for predictive map generation, based upon thosevalues.

Logic 198 can determine whether the image is suitable in a variety ofdifferent ways. For instance, multifactor optimization logic 223 canperform a multifactor optimization using magnitude, distribution andvariability. The images can be sorted and selected based on theoptimization. Threshold logic 224 may compare the values assigned to theimage to threshold values. If they meet the threshold values, then theimage may be selected as an image to be used for predictive mapgeneration.

In another example, sorting logic 226 can sort the processed imagesbased upon one or more of the magnitude, distribution and/or thevariability values corresponding to each image. It may use the top Nimages (those images with the top N values of magnitude, distributionand/or variability) for predictive map generation. It will be noted,however, that other mechanisms for selecting the images, based upon themagnitude, variability, distribution, mean, or other statistical metricvalues assigned to them, can be used as well.

Map generator logic 200 receives the selected images from imageselection logic 198 and generates a predictive map based upon thoseimages. In one example, the predictive map is a predictive yield mapwhich generates a predicated yield value for different locations in thefield, based upon the selected images. Communication system 192 thenprovides the predictive map 198 to harvester 100 (in the example wheresystem 186 is separate from harvester 100) so that it can be used tocontrol harvester 100.

At some point, harvester 100 may sense (or derive) actual yield. In thatcase, the actual yield values, along with the location corresponding tothose yield values, can be provided back to system 186 where mapcorrection logic 202 corrects the predictive map 188 based upon the insitu, actual yield, values. The corrected predictive map 188 can then beprovided to harvester 100 for continued control.

FIG. 2 shows that, in one example, harvester 100 includes one or moreprocessors 230, communication system 232, data store 234, a set ofsensors 236, control system 238, controllable subsystems 240, operatorinterface mechanisms 242, and it can include a wide variety of otheritems 244. Operator 246 interacts with operator interface mechanisms 242in order to control and manipulate harvester 100. Therefore, theoperator interface mechanisms 242 can include levers, a steering wheel,joysticks, buttons, pedals, linkages, etc. Where mechanisms 242 includea touch sensitive display screen, then they can also include operatoractuatable elements, such as links, icons, buttons, etc. that can beactuated using a point and click device or touch gestures. Wheremechanisms 242 include speech processing functionality, then they caninclude a microphone, a speaker, and other items for receiving speechcommands and generating synthesized speech outputs. They can include awide variety of other visual, audio and haptic mechanisms.

Sensors 236 can include position sensor 157 described above, a headingsensor 248 which identifies a heading or route which harvester 100 istaking. It can do that by processing multiple position sensors outputsand extrapolating a route, or otherwise. It can illustratively includespeed sensor 147 as discussed above, mass flow sensor 247, and moisturesensor 249. Mass flow sensor 247 can sense a mass flow of grain into theclean grain tank. This, along with crop moisture, sensed by sensor 249,can be used to generate a yield metric indicative of yield. Sensors 236can include a wide variety of other sensors 250 as well.

Controllable subsystems 240 can include propulsion subsystem 252,steering subsystem 254, machine actuators 256, power subsystem 258, cropprocessing subsystem 259, and it can include a wide variety of otheritems 260. Propulsion system 252 can include an engine or other powersource that controls propulsion of harvester 100. Steering subsystem 254can include actuators that can be actuated to steer harvester 100.Machine actuators 256 can include any of a wide variety of differenttypes of actuators that can be used to change machine settings, changemachine configuration, raise and lower the header, change differentsubsystem speeds (e.g., fan speed), etc. Power subsystem 258 can be usedto control the power utilization of harvester 100. It can be used tocontrol how much power is allocated to different subsystems, etc. Cropprocessing subsystems 259 can include such things as the front endequipment, the threshing subsystem, the cleaning subsystem, the materialhandling subsystem, and the residue subsystem, all of which aredescribed in more detail above with respect to FIG. 1. The othersubsystems 260 can include any other subsystems.

In operation, once harvester 100 receives predictive yield map 188,control system 238 receives the current position of harvester 100 fromthe position sensor and the heading or route (or another variableindicative of a future position) of harvester 100 and generates controlsignals to control the controllable subsystems 240 based upon thepredictive map 188 and the current and future positions of harvester100. For instance, where the predictive map 188 indicates that harvester100 is about to enter a very high yield portion of the field, thencontrol system 238 may control propulsion system 252 to slow down theground speed of harvester 100 to maintain a generally constant feedrate.Where it indicates that harvester 100 is about to enter a very low yieldportion, it may use steering system 254 to divert harvester 100 to ahigher yield portion of the field, or it may control propulsion system252 to increase speed of harvester 100. It can generate control signalsto control machine actuators 256 to change machine settings, or powersubsystem 258 to change power utilization or reallocate power indifferent ways among the subsystems, etc. It can control any of the cropprocessing subsystems 259 as well.

FIGS. 3A and 3B (collectively referred to herein as FIG. 3) show a flowdiagram illustrating one example of the operation of architecture 180 inselecting images 184, generating a predictive map 188, and using thatpredictive map 188 to control harvester 100. It is first assumed thataerial image capture system 182 and/or 183 are deployed to captureimages 184 of the field under consideration This is indicated by block262 in the flow diagram of FIG. 3. It will be noted that the images 184can be captured over a single day, or another single period, or they canbe captured at different times during the growing season, as indicatedby block 264. They can be captured in a wide variety of other ways aswell, and this is indicated by block 266.

Vegetation index metric identifier logic 206 then selects an image forprocessing. This is indicated by block 268. Image quality identifierlogic 205 then checks the image quality to determine whether it issufficient for further processing. The image quality may suffer for avariety of reasons, such as the presence of clouds, shadows, obscurants,etc. Calculating image quality is indicated by block 267. Checking forclouds is indicated by block 269 and checking for shade is indicated byblock 271. Checking for other things (such as dust or other obscurants,etc.) that may affect image quality is indicated by block 273.Determining whether the image quality is sufficient is indicated byblock 275. If not, processing reverts to block 268 where another imageis selected. If quality is sufficient, then vegetation index metricidentifier logic 206, illustratively assigns vegetation index metricvalues to different portions of the image (and thus to differentlocations of the field that the image represents). This is indicated byblock 270. As discussed above, leaf area index logic 208 can generateleaf area index metric values for the image. This is indicated by block272. NDVI logic 210 can generate NDVI metric values for the image. Thisis indicated by block 274. Crop moisture can also be measured orotherwise established, as indicated by block 276, as can croporientation, as indicated by block 277. Other vegetation index valuescan be assigned as well, or instead, and this is indicated by block 279.

Adequate plant growth identifier 216 then determines whether the aerialimage was taken at a time when adequate plant growth is reflected in theimage. This is done by determining whether the vegetation index valuescorresponding to the image have values that show sufficient active plantgrowth. Determining whether the image shows adequate plant growth isindicated by block 278 in the flow diagram of FIG. 3.

Image analysis logic 214 then performs the additional image analysis onthe selected image to assign it a magnitude, distribution and a level ofvariability that is represented in the image. This is indicated by block280 in the flow diagram of FIG. 3. In one example, magnitude identifier215 identifies the magnitude of the range of the vegetation indexvalues. This is indicated by block 282. Distribution identifier 217identifies distribution of those values. This is indicated by block 283.Variability identifier 218 calculates a variation in the vegetationindex values (or the variability in those values) across the image. Thisis indicated by block 284. The image analysis can be performed in otherways as well, and this is indicated by block 285.

Spectral analysis system 196 then determines whether there are moreimages 184 to be processed. This is indicated by block 286. If so,processing reverts to block 268 where a next image is selected forprocessing.

If no more images need to processed then image selection logic 198selects one or more images for generating a predictive map 188 based onthe magnitude, distribution and/or level of variability, correspondingto each of the images. This is indicated by block 288 in the flowdiagram of FIG. 3.

In one example, multifactor optimization logic 223 performs anoptimization based on the magnitude, variability and distribution of thevegetation index metric values. This is indicated by block 289. Inanother example, threshold logic 224 compares the variability (or othercharacteristic) value of each image to a corresponding threshold valueto determine whether it is sufficient. This is indicated by block 290.In another example, sorting logic 226 sorts the processed image by thecharacteristics discussed above to identify those images with the top(e.g., best) values and selects those images. This is indicated by block292. The images can be selected, based upon the magnitude, distributionand/or variability values, in other ways as well. This is indicated byblock 294.

Map generator logic 200 then generates a predictive map 188 using theselected images. This is indicated by block 296 in the flow diagram ofFIG. 3. In one example, map generator logic 200 can generate the mapusing other information as well. That information can include suchthings a topology, crop type, crop properties (e.g., crop moisture,etc.), environmental conditions (such as soil moisture, weather, etc.),or a prediction model based on data modeling. Considering othervariables in generating the map is indicated by block 298. The map maybe a predictive yield map which gives predicted yield values fordifferent areas in the field. This is indicated by block 300. Thepredictive map can be generated in other ways, and represent other cropproperties such as biomass, moisture, protein, starch, oil etc., aswell, and this is indicated by block 302.

The predictive map 188 is then output for control of harvester 100. Thisis indicated by block 304.

Control system 238 can then receive sensor signals from sensors 238which indicate the harvester position and route (or heading or othervalue that indicates where the harvester is traveling). This isindicated by block 306. The sensor values can include a current position308, speed 310, heading 312, and/or a wide variety of other values 314.

Based upon the harvester position, and where it is headed, and alsobased upon the values in the predictive map, control system 238generates harvester control signals to control one or more controllablesubsystems 240. Generating the control signals is indicated by block316. It then applies the control signals to the controllable subsystemsto control harvester 100. This is indicated by block 318. It can do thisin a variety of different ways. For instance, it can control thepropulsion/speed of harvester 100 (e.g., to maintain a constantfeedrate, etc.), as indicated by block 320. It can control the route ordirection of harvester 100, by controlling the steering subsystems 254.This is indicated by block 322. It can control any of a wide variety ofdifferent types of machine actuators 256, as indicated by block 324. Itcan control power subsystems 258 to control power utilization or powerallocation among subsystems, as indicated by block 326. It can controlany of the crop processing subsystems 259, as indicated by block 327. Itcan apply the control signals to different controllable subsystems tocontrol harvester 100 in different ways as well. This is indicated byblock 328.

As discussed above, sensors 236 can include a mass flow sensor 247 andmoisture sensor 249 which can be used to derive actual yield onharvester 100. This is indicated by block 330. The actual yield, alongwith the position where the yield was realized, can be fed back to mapcorrection logic 202 which makes any desirable corrections to thepredictive map 188, based upon the actual yield values derived frominformation sensed by the sensors 247 and 249. This is indicated byblock 332. For instance, where the actual yield is consistently offsetfrom the predicted yield by some value or function, that value orfunction may be applied to the remaining yield values on the predictivemap as corrections. This is just one example.

When the harvester has completed harvesting the field, then theoperation is complete. Until then, processing may revert to block 304where the corrected map (if any corrections were made) are provided backto harvester control system 238 which uses it to control the harvester.Determining whether the operation is complete is indicated by block 334.

It will be noted that the above discussion has described a variety ofdifferent systems, components and/or logic. It will be appreciated thatsuch systems, components and/or logic can be comprised of hardware items(such as processors and associated memory, or other processingcomponents, some of which are described below) that perform thefunctions associated with those systems, components and/or logic. Inaddition, the systems, components and/or logic can be comprised ofsoftware that is loaded into a memory and is subsequently executed by aprocessor or server, or other computing component, as described below.The systems, components and/or logic can also be comprised of differentcombinations of hardware, software, firmware, etc., some examples ofwhich are described below. These are only some examples of differentstructures that can be used to form the systems, components and/or logicdescribed above. Other structures can be used as well.

The present discussion has mentioned processors and servers. In oneembodiment, the processors and servers include computer processors withassociated memory and timing circuitry, not separately shown. They arefunctional parts of the systems or devices to which they belong and areactivated by, and facilitate the functionality of the other componentsor items in those systems.

Also, a number of user interface displays have been discussed. They cantake a wide variety of different forms and can have a wide variety ofdifferent user actuatable input mechanisms disposed thereon. Forinstance, the user actuatable input mechanisms can be text boxes, checkboxes, icons, links, drop-down menus, search boxes, etc. They can alsobe actuated in a wide variety of different ways. For instance, they canbe actuated using a point and click device (such as a track ball ormouse). They can be actuated using hardware buttons, switches, ajoystick or keyboard, thumb switches or thumb pads, etc. They can alsobe actuated using a virtual keyboard or other virtual actuators. Inaddition, where the screen on which they are displayed is a touchsensitive screen, they can be actuated using touch gestures. Also, wherethe device that displays them has speech recognition components, theycan be actuated using speech commands.

A number of data stores have also been discussed. It will be noted theycan each be broken into multiple data stores. All can be local to thesystems accessing them, all can be remote, or some can be local whileothers are remote. All of these configurations are contemplated herein.

Also, the figures show a number of blocks with functionality ascribed toeach block. It will be noted that fewer blocks can be used so thefunctionality is performed by fewer components. Also, more blocks can beused with the functionality distributed among more components.

FIG. 4 is a block diagram of harvester 100, shown in FIG. 2, except thatit communicates with elements in a remote server architecture 500. In anexample, remote server architecture 500 can provide computation,software, data access, and storage services that do not require end-userknowledge of the physical location or configuration of the system thatdelivers the services. In various examples, remote servers can deliverthe services over a wide area network, such as the internet, usingappropriate protocols. For instance, remote servers can deliverapplications over a wide area network and they can be accessed through aweb browser or any other computing component. Software or componentsshown in FIG. 2 as well as the corresponding data, can be stored onservers at a remote location. The computing resources in a remote serverenvironment can be consolidated at a remote data center location or theycan be dispersed. Remote server infrastructures can deliver servicesthrough shared data centers, even though they appear as a single pointof access for the user. Thus, the components and functions describedherein can be provided from a remote server at a remote location using aremote server architecture. Alternatively, they can be provided from aconventional server, or they can be installed on client devicesdirectly, or in other ways.

In the example shown in FIG. 4, some items are similar to those shown inFIG. 2 and they are similarly numbered. FIG. 4 specifically shows thatpredictive map generation system 186 can be located at a remote serverlocation 502. Therefore, harvester 100 accesses those systems throughremote server location 502.

FIG. 4 also depicts another example of a remote server architecture.FIG. 4 shows that it is also contemplated that some elements of FIG. 2are disposed at remote server location 502 while others are not. By wayof example, data store 194 can be disposed at a location separate fromlocation 502, and accessed through the remote server at location 502.Regardless of where they are located, they can be accessed directly byharvester 100, through a network (either a wide area network or a localarea network), they can be hosted at a remote site by a service, or theycan be provided as a service, or accessed by a connection service thatresides in a remote location. Also, the data can be stored insubstantially any location and intermittently accessed by, or forwardedto, interested parties. For instance, physical carriers can be usedinstead of, or in addition to, electromagnetic wave carriers. In such anexample, where cell coverage is poor or nonexistent, another mobilemachine (such as a fuel truck) can have an automated informationcollection system. As the harvester comes close to the fuel truck forfueling, the system automatically collects the information from theharvester or transfers information to the harvester using any type ofad-hoc wireless connection. The collected information can then beforwarded to the main network as the fuel truck reaches a location wherethere is cellular coverage (or other wireless coverage). For instance,the fuel truck may enter a covered location when traveling to fuel othermachines or when at a main fuel storage location. All of thesearchitectures are contemplated herein. Further, the information can bestored on the harvester until the harvester enters a covered location.The harvester, itself, can then send and receive the information to/fromthe main network.

It will also be noted that the elements of FIG. 2, or portions of them,can be disposed on a wide variety of different devices. Some of thosedevices include servers, desktop computers, laptop computers, tabletcomputers, or other mobile devices, such as palm top computers, cellphones, smart phones, multimedia players, personal digital assistants,etc.

FIG. 5 is a simplified block diagram of one illustrative example of ahandheld or mobile computing device that can be used as a user's orclient's hand held device 16, in which the present system (or parts ofit) can be deployed. For instance, a mobile device can be deployed inthe operator compartment of harvester 100 for use in generating,processing, or displaying the stool width and position data. FIGS. 6-7are examples of handheld or mobile devices.

FIG. 5 provides a general block diagram of the components of a clientdevice 16 that can run some components shown in FIG. 2, that interactswith them, or both. In the device 16, a communications link 13 isprovided that allows the handheld device to communicate with othercomputing devices and under some embodiments provides a channel forreceiving information automatically, such as by scanning. Examples ofcommunications link 13 include allowing communication though one or morecommunication protocols, such as wireless services used to providecellular access to a network, as well as protocols that provide localwireless connections to networks.

In other examples, applications can be received on a removable SecureDigital (SD) card that is connected to an interface 15. Interface 15 andcommunication links 13 communicate with a processor 17 (which can alsoembody processors or servers from previous FIGS.) along a bus 19 that isalso connected to memory 21 and input/output (I/O) components 23, aswell as clock 25 and location system 27.

I/O components 23, in one example, are provided to facilitate input andoutput operations. I/O components 23 for various embodiments of thedevice 16 can include input components such as buttons, touch sensors,optical sensors, microphones, touch screens, proximity sensors,accelerometers, orientation sensors and output components such as adisplay device, a speaker, and or a printer port. Other I/O components23 can be used as well.

Clock 25 illustratively comprises a real time clock component thatoutputs a time and date. It can also, illustratively, provide timingfunctions for processor 17.

Location system 27 illustratively includes a component that outputs acurrent geographical location of device 16. This can include, forinstance, a global positioning system (GPS) receiver, a LORAN system, adead reckoning system, a cellular triangulation system, or otherpositioning system. It can also include, for example, mapping softwareor navigation software that generates desired maps, navigation routesand other geographic functions.

Memory 21 stores operating system 29, network settings 31, applications33, application configuration settings 35, data store 37, communicationdrivers 39, and communication configuration settings 41. Memory 21 caninclude all types of tangible volatile and non-volatilecomputer-readable memory devices. It can also include computer storagemedia (described below). Memory 21 stores computer readable instructionsthat, when executed by processor 17, cause the processor to performcomputer-implemented steps or functions according to the instructions.Processor 17 can be activated by other components to facilitate theirfunctionality as well.

FIG. 6 shows one example in which device 16 is a tablet computer 600. InFIG. 6, computer 600 is shown with user interface display screen 602.Screen 602 can be a touch screen or a pen-enabled interface thatreceives inputs from a pen or stylus. It can also use an on-screenvirtual keyboard. Of course, it might also be attached to a keyboard orother user input device through a suitable attachment mechanism, such asa wireless link or USB port, for instance. Computer 600 can alsoillustratively receive voice inputs as well.

FIG. 7 shows that the device can be a smart phone 71. Smart phone 71 hasa touch sensitive display 73 that displays icons or tiles or other userinput mechanisms 75. Mechanisms 75 can be used by a user to runapplications, make calls, perform data transfer operations, etc. Ingeneral, smart phone 71 is built on a mobile operating system and offersmore advanced computing capability and connectivity than a featurephone.

Note that other forms of the devices 16 are possible.

FIG. 8 is one example of a computing environment in which elements ofFIG. 2, or parts of it, (for example) can be deployed. With reference toFIG. 8, an example system for implementing some embodiments includes acomputing device in the form of a computer 810. Components of computer810 may include, but are not limited to, a processing unit 820 (whichcan comprise processors or servers from previous FIGS.), a system memory830, and a system bus 821 that couples various system componentsincluding the system memory to the processing unit 820. The system bus821 may be any of several types of bus structures including a memory busor memory controller, a peripheral bus, and a local bus using any of avariety of bus architectures. Memory and programs described with respectto FIG. 2 can be deployed in corresponding portions of FIG. 8.

Computer 810 typically includes a variety of computer readable media.Computer readable media can be any available media that can be accessedby computer 810 and includes both volatile and nonvolatile media,removable and non-removable media. By way of example, and notlimitation, computer readable media may comprise computer storage mediaand communication media. Computer storage media is different from, anddoes not include, a modulated data signal or carrier wave. It includeshardware storage media including both volatile and nonvolatile,removable and non-removable media implemented in any method ortechnology for storage of information such as computer readableinstructions, data structures, program modules or other data. Computerstorage media includes, but is not limited to, RAM, ROM, EEPROM, flashmemory or other memory technology, CD-ROM, digital versatile disks (DVD)or other optical disk storage, magnetic cassettes, magnetic tape,magnetic disk storage or other magnetic storage devices, or any othermedium which can be used to store the desired information and which canbe accessed by computer 810. Communication media may embody computerreadable instructions, data structures, program modules or other data ina transport mechanism and includes any information delivery media. Theterm “modulated data signal” means a signal that has one or more of itscharacteristics set or changed in such a manner as to encode informationin the signal.

The system memory 830 includes computer storage media in the form ofvolatile and/or nonvolatile memory such as read only memory (ROM) 831and random access memory (RAM) 832. A basic input/output system 833(BIOS), containing the basic routines that help to transfer informationbetween elements within computer 810, such as during start-up, istypically stored in ROM 831. RAM 832 typically contains data and/orprogram modules that are immediately accessible to and/or presentlybeing operated on by processing unit 820. By way of example, and notlimitation, FIG. 8 illustrates operating system 834, applicationprograms 835, other program modules 836, and program data 837.

The computer 810 may also include other removable/non-removablevolatile/nonvolatile computer storage media. By way of example only,FIG. 8 illustrates a hard disk drive 841 that reads from or writes tonon-removable, nonvolatile magnetic media, an optical disk drive 855,and nonvolatile optical disk 856. The hard disk drive 841 is typicallyconnected to the system bus 821 through a non-removable memory interfacesuch as interface 840, and optical disk drive 855 is typically connectedto the system bus 821 by a removable memory interface, such as interface850.

Alternatively, or in addition, the functionality described herein can beperformed, at least in part, by one or more hardware logic components.For example, and without limitation, illustrative types of hardwarelogic components that can be used include Field-programmable Gate Arrays(FPGAs), Application-specific Integrated Circuits (e.g., ASICs),Application-specific Standard Products (e.g., ASSPs), System-on-a-chipsystems (SOCs), Complex Programmable Logic Devices (CPLDs), etc.

The drives and their associated computer storage media discussed aboveand illustrated in FIG. 8, provide storage of computer readableinstructions, data structures, program modules and other data for thecomputer 810. In FIG. 8, for example, hard disk drive 841 is illustratedas storing operating system 844, application programs 845, other programmodules 846, and program data 847. Note that these components can eitherbe the same as or different from operating system 834, applicationprograms 835, other program modules 836, and program data 837.

A user may enter commands and information into the computer 810 throughinput devices such as a keyboard 862, a microphone 863, and a pointingdevice 861, such as a mouse, trackball or touch pad. Other input devices(not shown) may include a joystick, game pad, satellite dish, scanner,or the like. These and other input devices are often connected to theprocessing unit 820 through a user input interface 860 that is coupledto the system bus, but may be connected by other interface and busstructures. A visual display 891 or other type of display device is alsoconnected to the system bus 821 via an interface, such as a videointerface 890. In addition to the monitor, computers may also includeother peripheral output devices such as speakers 897 and printer 896,which may be connected through an output peripheral interface 895.

The computer 810 is operated in a networked environment using logicalconnections (such as a local area network—LAN, or wide area network—WANor a controller area network—CAN) to one or more remote computers, suchas a remote computer 880.

When used in a LAN networking environment, the computer 810 is connectedto the LAN 871 through a network interface or adapter 870. When used ina WAN networking environment, the computer 810 typically includes amodem 872 or other means for establishing communications over the WAN873, such as the Internet. In a networked environment, program modulesmay be stored in a remote memory storage device. FIG. 10 illustrates,for example, that remote application programs 885 can reside on remotecomputer 880.

It should also be noted that the different examples described herein canbe combined in different ways. That is, parts of one or more examplescan be combined with parts of one or more other examples. All of this iscontemplated herein.

Example 1 is a method of controlling a work machine comprising:

obtaining a predictive map including predictive values of anagricultural characteristic of a worksite;

identifying an in-situ value of the agricultural characteristic based ona sensor signal provided by an in-situ sensor;

generating a corrected predictive map including corrected predictivevalues of the agricultural characteristic based on the in-situ value ofthe agricultural characteristic; and

controlling a controllable subsystem of the work machine based on alocation of the work machine and the corrected predictive map.

Example 2 is the method of any or all previous examples, whereinobtaining the predictive map comprises:

receiving a plurality of images of spectral response at the worksite;

identifying a set of vegetation index values based on the spectralresponse;

identifying a vegetation index characteristic, corresponding to eachimage, indicative of how the set of vegetation index values variesacross the corresponding image;

selecting an image, from the plurality of images, based on thevegetation index characteristic; and

generating the predictive map, based on the selected image.

Example 3 is the method of any or all previous examples, whereingenerating the corrected predictive map including corrected predictivevalues of the agricultural characteristic based on the in-situ value ofthe agricultural characteristic comprises:

identifying a location of the worksite to which the in-situ value of theagricultural characteristic corresponds;

identifying a predictive value of the agricultural characteristic,provided by the predictive map, corresponding to the location of theworksite; and

comparing the predictive value of the agricultural characteristiccorresponding to the location of the worksite to the in-situ value ofthe agricultural characteristic corresponding to the location of theworksite to identify an offset between the predictive value of theagricultural characteristic corresponding to the location of theworksite and the in-situ value of the agricultural characteristiccorresponding to the location of the worksite.

Example 4 is the method of any or all previous examples, whereingenerating the corrected predictive map including corrected predictivevalues of the agricultural characteristic based on the in-situ value ofthe agricultural characteristic further comprises:

generating the corrected predictive values of the agriculturalcharacteristic based on the offset.

Example 5 is the method of any or all previous examples, whereingenerating the corrected predictive values of the agriculturalcharacteristic based on the offset comprises:

applying the offset, as a value or a function, to other predictivevalues of the agricultural characteristic provided by the predictive mapto generate the corrected predictive values of the agriculturalcharacteristic.

Example 6 is the method of any or all previous examples, whereinobtaining the predictive map including predictive values of theagricultural characteristic comprises:

obtaining a predictive yield map including predictive values of yield.

Example 7 is the method of any or all previous examples, whereinidentifying the in-situ value of the agricultural characteristic basedon the sensor signal provided by the in-situ sensor comprises:

identifying an in-situ value of yield based on a mass flow signalprovided by a mass flow sensor.

Example 8 is the method of any or all previous examples, whereingenerating the corrected predictive map including corrected predictivevalues of the agricultural characteristic based on the in-situ value ofthe agricultural characteristic comprises:

generating a corrected predictive yield map including correctedpredictive values of yield based on the in-situ value of yield.

Example 9 is the method of any or all previous examples, whereincontrolling the controllable subsystem of the work machine based on thelocation of the work machine and the corrected predictive map comprises:

controlling a machine actuator of the work machine based on the locationof the work machine and the corrected predictive map.

Example 10 is the method of any or all previous examples, whereincontrolling the controllable subsystem of the work machine based on thelocation of the work machine and the corrected predictive map comprises:

controlling a propulsion subsystem of the work machine based on thelocation of the work machine and the corrected predictive map.

Example 11 is the method of any or all previous examples, whereincontrolling the controllable subsystem of the work machine based on thelocation of the work machine and the corrected predictive map comprises:

controlling a steering subsystem of the work machine based on thelocation of the work machine and the corrected predictive map.

Example 12 is the method of any or all previous examples, whereincontrolling the controllable subsystem of the work machine based on thelocation of the work machine and the corrected predictive map comprises:

controlling a crop processing subsystem of the work machine based on thelocation of the work machine and the corrected predictive map.

Example 13 is a work machine comprising:

a communication system configured to obtain a predictive map includingpredictive values of an agricultural characteristic of a worksite;

a controllable subsystem;

an in-situ sensor configured to generate a sensor signal indicative ofan in-situ value of the agricultural characteristic while the workmachine is operating at the worksite;

a map generation system, implemented by one or more processors,configured to generate a corrected predictive map including correctedpredictive values of the agricultural characteristic based on the sensorsignal indicative of the in-situ value of the agriculturalcharacteristic; and

a control system configured to control the controllable subsystem of thework machine based on a location of the work machine and the correctedpredictive map.

Example 14 is the work machine of any or all previous examples, whereinthe map generation system is further configured to:

obtain a plurality of images of spectral response at a worksite;

identify a set of vegetation index values based on the spectralresponse;

identify a vegetation index characteristic, corresponding to each image,indicative of how the set of vegetation index values varies across thecorresponding image;

select an image, from the plurality of images, based on the vegetationindex characteristic;

generate the predictive map including predictive values of theagricultural characteristic based on the selected image; and

wherein the communication system obtains the predictive map from the mapgeneration system.

Example 15 is the work machine of any or all previous examples, whereinthe agricultural characteristic is yield.

Example 16 is the work machine of any or all previous examples, whereinthe in-situ sensor comprises:

a mass flow sensor configured to generate a mass flow signal.

Example 17 is the work machine of any or all previous examples, whereinthe map generation system is further configured to:

identify a location of the worksite to which the in-situ value of theagricultural characteristic corresponds;

identify a predictive value of the agricultural characteristic, providedby the predictive map, corresponding to the location of the worksite;

identify an offset between the predictive value of the agriculturalcharacteristic corresponding to the location and the in-situ value ofthe agricultural characteristic corresponding to the location; and

generate the corrected predictive values of the agriculturalcharacteristic based on the offset to generate the corrected predictivemap.

Example 18 is the work machine of any or all previous examples, whereinthe map generation system is configured to apply the offset, as a valueor function, to other predictive values of the agriculturalcharacteristic provided by the predictive map to generate the correctedpredictive values of the agricultural characteristic.

Example 19 is a predictive map generation system comprising:

a communication system configured to receive an image of vegetation at aworksite; and

a processor configured to:

generate a predictive map including predictive values of an agriculturalcharacteristic of the worksite based on the image of vegetation at theworksite; and

generate a corrected predictive map including corrected predictivevalues of the agricultural characteristic of the worksite based on asensor signal that is indicative of an in-situ value of the agriculturalcharacteristic, the sensor signal provided by an in-situ sensorassociated with a work machine while the work machine is operating atthe worksite.

Example 20 is the predictive map generation system of any or allprevious examples, wherein the communication system is configured toreceive a plurality of images of vegetation at the worksite and whereinthe map generation system further comprises:

a spectral analysis system configured to:

identify a set of vegetation index values based on a spectral responseof the vegetation at the worksite, as indicated by the plurality ofimages;

identify a vegetation index characteristic, corresponding to each image,indicative of how the set of vegetation index values varies across thecorresponding image; and

select an image, from the plurality of images, based on the vegetationindex characteristic, and

wherein the processor is configured to generate the predictive map basedon the selected image.

Although the subject matter has been described in language specific tostructural features and/or methodological acts, it is to be understoodthat the subject matter defined in the appended claims is notnecessarily limited to the specific features or acts described above.Rather, the specific features and acts described above are disclosed asexample forms of implementing the claims.

What is claimed is:
 1. A method of controlling a work machinecomprising: obtaining a predictive map including predictive values of anagricultural characteristic of a worksite; identifying an in-situ valueof the agricultural characteristic based on a sensor signal provided byan in-situ sensor; generating a corrected predictive map includingcorrected predictive values of the agricultural characteristic based onthe in-situ value of the agricultural characteristic; and controlling acontrollable subsystem of the work machine based on a location of thework machine and the corrected predictive map.
 2. The method of claim 1,wherein obtaining the predictive map comprises: receiving a plurality ofimages of spectral response at the worksite; identifying a set ofvegetation index values based on the spectral response; identifying avegetation index characteristic, corresponding to each image, indicativeof how the set of vegetation index values varies across thecorresponding image; selecting an image, from the plurality of images,based on the vegetation index characteristic; and generating thepredictive map, based on the selected image.
 3. The method of claim 1,wherein generating the corrected predictive map including correctedpredictive values of the agricultural characteristic based on thein-situ value of the agricultural characteristic comprises: identifyinga location of the worksite to which the in-situ value of theagricultural characteristic corresponds; identifying a predictive valueof the agricultural characteristic, provided by the predictive map,corresponding to the location of the worksite; and comparing thepredictive value of the agricultural characteristic corresponding to thelocation of the worksite to the in-situ value of the agriculturalcharacteristic corresponding to the location of the worksite to identifyan offset between the predictive value of the agriculturalcharacteristic corresponding to the location of the worksite and thein-situ value of the agricultural characteristic corresponding to thelocation of the worksite.
 4. The method of claim 3, wherein generatingthe corrected predictive map including corrected predictive values ofthe agricultural characteristic based on the in-situ value of theagricultural characteristic further comprises: generating the correctedpredictive values of the agricultural characteristic based on theoffset.
 5. The method of claim 4, wherein generating the correctedpredictive values of the agricultural characteristic based on the offsetcomprises: applying the offset, as a value or a function, to otherpredictive values of the agricultural characteristic provided by thepredictive map to generate the corrected predictive values of theagricultural characteristic.
 6. The method of claim 1, wherein obtainingthe predictive map including predictive values of the agriculturalcharacteristic comprises: obtaining a predictive yield map includingpredictive values of yield.
 7. The method of claim 6, whereinidentifying the in-situ value of the agricultural characteristic basedon the sensor signal provided by the in-situ sensor comprises:identifying an in-situ value of yield based on a mass flow signalprovided by a mass flow sensor.
 8. The method of claim 7, whereingenerating the corrected predictive map including corrected predictivevalues of the agricultural characteristic based on the in-situ value ofthe agricultural characteristic comprises: generating a correctedpredictive yield map including corrected predictive values of yieldbased on the in-situ value of yield.
 9. The method of claim 1, whereincontrolling the controllable subsystem of the work machine based on thelocation of the work machine and the corrected predictive map comprises:controlling a machine actuator of the work machine based on the locationof the work machine and the corrected predictive map.
 10. The method ofclaim 1, wherein controlling the controllable subsystem of the workmachine based on the location of the work machine and the correctedpredictive map comprises: controlling a propulsion subsystem of the workmachine based on the location of the work machine and the correctedpredictive map.
 11. The method of claim 1, wherein controlling thecontrollable subsystem of the work machine based on the location of thework machine and the corrected predictive map comprises: controlling asteering subsystem of the work machine based on the location of the workmachine and the corrected predictive map.
 12. The method of claim 1,wherein controlling the controllable subsystem of the work machine basedon the location of the work machine and the corrected predictive mapcomprises: controlling a crop processing subsystem of the work machinebased on the location of the work machine and the corrected predictivemap.
 13. A work machine comprising: a communication system configured toobtain a predictive map including predictive values of an agriculturalcharacteristic of a worksite; a controllable subsystem; an in-situsensor configured to generate a sensor signal indicative of an in-situvalue of the agricultural characteristic while the work machine isoperating at the worksite; a map generation system, implemented by oneor more processors, configured to generate a corrected predictive mapincluding corrected predictive values of the agricultural characteristicbased on the sensor signal indicative of the in-situ value of theagricultural characteristic; and a control system configured to controlthe controllable subsystem of the work machine based on a location ofthe work machine and the corrected predictive map.
 14. The work machineof claim 13, wherein the map generation system is further configured to:obtain a plurality of images of spectral response at a worksite;identify a set of vegetation index values based on the spectralresponse; identify a vegetation index characteristic, corresponding toeach image, indicative of how the set of vegetation index values variesacross the corresponding image; select an image, from the plurality ofimages, based on the vegetation index characteristic; generate thepredictive map including predictive values of the agriculturalcharacteristic based on the selected image; and wherein thecommunication system obtains the predictive map from the map generationsystem.
 15. The work machine of claim 13, wherein the agriculturalcharacteristic is yield.
 16. The work machine of claim 15, wherein thein-situ sensor comprises: a mass flow sensor configured to generate amass flow signal.
 17. The work machine of claim 13, wherein the mapgeneration system is further configured to: identify a location of theworksite to which the in-situ value of the agricultural characteristiccorresponds; identify a predictive value of the agriculturalcharacteristic, provided by the predictive map, corresponding to thelocation of the worksite; identify an offset between the predictivevalue of the agricultural characteristic corresponding to the locationand the in-situ value of the agricultural characteristic correspondingto the location; and generate the corrected predictive values of theagricultural characteristic based on the offset to generate thecorrected predictive map.
 18. The work machine of claim 17, wherein themap generation system is configured to apply the offset, as a value orfunction, to other predictive values of the agricultural characteristicprovided by the predictive map to generate the corrected predictivevalues of the agricultural characteristic.
 19. A predictive mapgeneration system comprising: a communication system configured toreceive an image of vegetation at a worksite; and a processor configuredto: generate a predictive map including predictive values of anagricultural characteristic of the worksite based on the image ofvegetation at the worksite; and generate a corrected predictive mapincluding corrected predictive values of the agricultural characteristicof the worksite based on a sensor signal that is indicative of anin-situ value of the agricultural characteristic, the sensor signalprovided by an in-situ sensor associated with a work machine while thework machine is operating at the worksite.
 20. The predictive mapgeneration system of claim 19, wherein the communication system isconfigured to receive a plurality of images of vegetation at theworksite and wherein the map generation system further comprises: aspectral analysis system configured to: identify a set of vegetationindex values based on a spectral response of the vegetation at theworksite, as indicated by the plurality of images; identify a vegetationindex characteristic, corresponding to each image, indicative of how theset of vegetation index values varies across the corresponding image;and select an image, from the plurality of images, based on thevegetation index characteristic, and wherein the processor is configuredto generate the predictive map based on the selected image.